0
0
0
0
0
2
2
0
4
4
0
2
2
0
4
4
0
0
0
0
0
2
0
4
0
0
0
4
0
0
0
0
0
0
0
0
2
1
0
0
4
0
0
0
4
0
0
4
0
0
4
0
0
0